The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 27, 2004
Filed:
Aug. 23, 2001
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 2/754 ;
U.S. Cl.
CPC ...
G03B 2/754 ;
Abstract
Disclosed is an illumination system which includes a first optical system for combining plural light fluxes from plural light sources and for projecting the plural light fluxes to a surface to be illuminated, a second optical system for separating a portion of one of the combined plural light fluxes, and a first detecting system for detecting the light quantity of the portion separated by the second optical system.